The purpose of this study is to determine the prevalence of pulmonary hypertension (PH) among patients suffering from Chronic Obstructive Pulmonary Disease (COPD) and to assess the quality of life in those patients with concomitant PH compared to COPD patients without PH and those only suffering from pulmonary arterial hypertension (PAH) respectively.

Any medical, psychological or other condition, which limits the patient's ability to provide informed consent

No written informed consent provided

Current participation in another clinical trial

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01423071